Hi All

I have a 1999 D2 with a little knock problem. I just ordered a I930 scanner and was wondering if the live data will show knock sensor readings. When I monitor engine timing advance on my scangauge and it starts to knock I see no change in timing. It doesn't retard. I get no CEL or codes. I run top tier 93 octane fuel. I'm really hoping to be able to monitor knock sensors with my new I930. Have any of you had a faulty knock sensor that didn't throw a CEL code?

 

Shaggy I can only answer the final question. I've had my Disco II for 17 years. The only time I ever got a knock sensor code or saw any indication of a timing problem is when the wire to my knock sensor burnt through because I routed it incorrectly. The timing issue showed up first when the wire grounded, then the code (and the smoke from burning wire insulation!) occurred. I had no choice but to keep driving but the engine was a DOG until I fixed the wire. Technically, I didn't have a faulty knock sensor--ive never had a faulty one (multiple Engines) but the grounded then burnt wire emulated the same.

 

Well I did look at the wires and they are attached at the sensors. They run towards the front and I couldn't really see where they end up. I should definitely see the timing back off when knock is occurring right.? Well my scanner arrived yesterday according to tracking. I'll check the mail box when I get home from work. Whether its a wire or a sensor I believe something is wrong.

 

The knock sensor wires should go up to the space between the lower and upper intakes they are on the same wiring bundle a the injectors and exit the front, behind the air conditioner compressor.

As far as I recall, timing is dictated by a combination of inputs from the knock sensors, the MAF, and the crank sensor. Maybe the cam sensor, too.

 

From a quick manual search.......